I'd like some feedback, especially on English fluency, containment procedure sanity and the order of information given in the description. I didn't really know in what order should I place the paragraphs, almost all of them require almost all other to be read before, so I kept rephrasing and rephrasing it lately…

Well, it doesn't really make sense why you would have Agents risking their lives in experiments; is there any particular reason that you are not using D-class? Also, I'm pretty sure that this isn't memetic but merely mind-affecting because the effect is not transferred through information (see Understanding Memetics). In addition, the skin irritation feels tacked-on. Containment is effectively impossible due to the extremely large area of effect (most of Western and Central Europe). Also, why would there be an increase in accidents statistically significant enough to come to the Foundation's attention?

The idea is not terrible, but the scope of how many instances of the object there must be (a single-digit percentage of all the littered paper in Western in Central Europe) makes this ridiculous, and there are some problems with grammar and sentence structure.

I'm using Agents to further clarify that everybody "misunderstands" the SCP, including its risk level.

So, it's not memetic. I suspected there was a better word for it.

The skin irritation is also just to stress the misunderstanding part, so that everybody shrugs it off and only when the mind affection wears off do they truly realize. So I need it different, or something completely else, something more naturally related to flyers. I'd say papercuts, but then I bet it would be just called -J material by many. So, poisonous printing ink maybe?

Increasing amount of incidents: I guessed that would be the most possible way to get to the Foundation's attention.
Maybe I would have needed to completely overthink its appearance, but the countries its active and not active in is actually the main idea behind this.

Grammar and sentence structure… when I'm reading other SCPs, I almost see what's the exact difference between fluent English and mine, but I still can't make use of this information for my advantage. Seems like spending much time on the internet simply doesn't train one in English, and English classes are so deep in the past by now for me… I wonder how many errors I did just in this post.

There seems to be a "mission: impossible" feeling about this, for two more reasons than how many were listed here. Maybe I should just put this and my other two usable ideas into an SCP fuel thread and let more Foundation compatible persons handle the situation.